A ball is thrown vertically upward from the ground

Asked by admin @ 11/08/2021 in Physics viewed by 307 People

A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of

A) 18 m/s
B) 25 m/s
C) 30 m/s
D) 36 m/s

Answered by admin @ 11/08/2021

$\huge\orange{ASSALAMUALAIKUM!}$

After reaching the maximum height, it falls for
2 second to reach the 25m height.

distance it has fallen is-

h=0.5gt^

0.5*10*4 =20m

so the maximum height- 25+20 =45m

then velocity at the bottom or the initial

velocity is found from

u^=2gh

=2*10*45=900

u=30m/s

$\huge\orange{INSHAALLAH it will help you!}$

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